Then shouldn't you call it a "drought" instead of "dry monsoon"? Why would you call it "monsoon" despite the fact that there's no rain?
Answer from a Native speaker
Good question! Actually, monsoons can be divided into summer monsoons and winter monsoons. Summer monsoons are wet monsoons characterized by heavy rainfall, and these are the type of monsoons that are most well-known. Winter monsoons occur from October to April and are usually dry (except for in parts of Southeast Asia, which experience heavy rainfall during the winter months). They are less powerful than summer monsoons and consist of winds coming from drier, warmer climates such as from Mongolia and northwestern China down into India. Although dry monsoons can cause droughts in some places, they can also cause flooding and landslides.